# Intermolecular potential for c60 molecule

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$\Phi_{12}(z) = \epsilon \left[ \frac{1-a}{(z^3/S +1 - 1/S)^{1/3} -a} \right]^{12} - 2\epsilon \left[ \frac{1-a}{(z^3/S +1 - 1/S)^{1/3} -a} \right]^{6}$
• $z := r/r_m$
• $r_m$ = 1.0281 nm
• $a$ = 0.09574 is the hard-core diameter in units of $r_m$
• $\epsilon$ = 3297.28 K is the well depth
• $S$ = 0.4120 is a softness parameter